Pressure-recorder.



C. D. YOUNG.

PRESSURE RECORDER.

APPLICATION mso luLYs. 1909. nENEwED wu 2o. 1915.

Patented May 7, 1918. 4 SHEETS-SHEET l witnesses 4 SHEETS-SHEET 2.

Patented lMay 7,1918.

C. D. YOUNG.

PRESSURE RECORDER.

c. n. YOUNG.

PRESSURE RECORDER.

APYLICATION FILED IUL Y6| l|909- RENEWED JULY 20.1915.

1 ,265, l 56. Patented kMay 7,1918.

4 SHEETS-SHEET 3.

@'M f7 ci@ l C. D. YOUNG.

PRESSURE RECORDER.

APPLlcAnoN f|LEo1uLYe,19o9. RENEwEn JULY 20.1915.

1,265, 1 56. Patented May 7, 1918.

4 SHEETS-SHEET 4.

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UNTED STATES "PATENT FFlE@ CHARLES D. YUNG, 0F gUllUi, u

.AMERGAN STEAM GAUGE it *lflfli MANUFACUEEN CGliNZ, 0E BSTON,MASSACHUSETTS, A CORPORATION 0F IIIASSAGHUSETTS.

IPRESSURE-BECBJDER.

Specification of Let-ters Pat-ent.

Application led July G, 1909, Serial No. 5065172. Renewed Iuly 20, 1915.Serial No. L311,020.

To all whom t may concern:

Be it known that I, CHARLES D. YOUNG, a citizen of the United States,residing at Columbus, n the county ot Franklin and State ofhio, haveinvented a certain new and useful Improvement in Fressure-ltecorders, ofWhich the tollowingY is a specification.

The primary object or this invention is t0 provide an improved andconvenient means for4 obtaining a graphical diagram of the hydraulicpressure at each movementI of the piston of a hydraulic press inmount-ing Wheels on axles, but the invention can be used for othe1purposes and with other iiuid pressures or other stresses. a

The invention resides in the construction of' the parts of theinstrument, as herein shown and described and then particularly pointed:out in the claims.

In the.V accompanying-drawings i-n which I have illustrated theembodiments ofthe invention and its application in use:

Figure 1 is a plan or top View With the interior mechanism shown inbroken lines under the cover-gI Fig. 2A is avieW in eleva-tion of' thetrent side offthecase as shown in Fig. 1, the interior parts beingshovn'in broken lines;-

Figf.` 3 iis la horizontal sectional view ofthe line m-mof Fig. 2;

Fig. .bis a view in elevation ol'ftheright handend loffthe case with theinterior parts shown in broken lines;

Fig. 5' is fa view showingtheinstrument attached toahydraulicsWheel-pressused tor applying or removing Wheelsk to or fromaxles;

Fig; 6' is a sectional detail ofthev indicator.

Fig. 7 's a section onthe'liney-y Fig.- 3 lookingl down.

Fig;l 8 is a, section on the'same line y-y looking up;

`Fig. 9'is a detail Viewy of` the interior spnflingV `pa-Wl thatengages; the tape Winding rol `.f

In the views; 7 designates lthe case which is, ofsuitable term` andcapacity to `receive the operating parts.` and having `a top orcoverhinged thereto at 7, and` a sliding bottom. 7F.' Yhen thetop andbottoni are in closedposition they areloclred by means 01E;A a bolt,`7F# passed through. suitable` holes in both, saidb'oltbeingprovidedwvith an eye 7 through which a seal or other secure lock ispassed to prevent access of the Worlnnan to` the parts within the box,it being a feature ot my invention to provide a construction secureagainst unwarranted manipulation or forgery of the records. ln railroadpractice it is important that those in authority be apprlsed oi detectsin car Wheels. The rear side ot the case 7 1s provided with a largeopening 7e through which the drumv and tape'can be removed,` and thecover is provided With-a slotted tongue 7E to embrace the shank of thedrum of: that mechanism.

The devices Within the case are as follows.: A paper tape roll receivingspindle 8 mounted in suitable bearings, one of Which, 8a? is yielding`so that the spindle canl be easily inserted and' removed. The bearingalso provides tension to prevent the spindle from turning too easily.The, spindle has secured to itl a longitudinally arranged spring clip 8bthat is :tree at one endso that the inner end ot the paper tape can beslid under it and be held to keep the roll from turning on the spindle.er` drum 9 to unwind the tape from the roll on the. spindle 8. The. drum9 has a mechanism for imparting to it an intermittent movement in onedirection 0nlyconsisting of an external head 10 having a toothed' rimengaged by diametrically opposite spring pressed paws 10a. The head l0is secured in the case by a set screw 12`en gaging a groove in the headand so as to permit the head to turn. The drum 9 is removably attachedto this head l0 so as to be turnedyufith it and the paWls 10a prevent areturn movement ofthe head or drum after it' has Wound the paper striponto itself. The drum 9 and head l0 are intermittently rotated by aninternal head l1 providedivith a grooved'end lla?" to receive a cordillb'that extends to the exterior of the case and spri'ngpressedfpavifls'llC carried by the internal head that engages a circular rackl'l on the head l0. The drum 9 has Within it 'an 'axial istationaryrod9f"on which is secured a spring 9b Which'- isalso secured totheinternal head l1V so as to tend to restore that head `by rotation to a;givenl position when pulled out of it by the cordllb., Therrod 9@ issecured in proper position in the case bya thumbunut 15 on theexteriorof the case. r:The spindlef8'" and drum 9 are loca-tedl parallelto each othervvith afspace between them and in this space is arrangedand secured near the cover a platform or tablet 13b over which the tapepasses from the spindle to the drum, the latter being provided With aslot 93 through which the free end of the tape is inserted to initiallybind the tape to that member. The tablet or platform is flanked withanti-friction roller 13au to facilitate the passage of the tape onto andofi' it. r1`he cover is provided with a glass pane l-l through which theoperation of the marker can be observed, but a small portion of thecover is left open at the rear end of the pane, as seen at 14, to exposethe edge of the tape for memoranda on the part of the operator or foridentifying the several articles treated With the corresponding recordsmade by the instrument.

The indicator shown in detail in Fig. 6 and designated generally by thecharacter 16 is substantially the same as that now commonly used indevices of the class to Which the present invention belongs. lit has theusual straight line motion stylographic pen arm 16EL to the end of whichis secured a small stylographic pen or other suitable devices 16b formarking and suitable means for securing proper pressure of the markingdevice on the paper tape. The arm is operated by pressure on a suitablepiston stem 16c both Working in suitable casing 16d but in the presentinstance the casing is made With a vent 16e to release pressure shouldthat become excessive, and the pen is held in zero position by means ofa spring 16f acting on the piston stem.

Referring more particularly to Fig. 5 in Which my invention is shown asapplied to a hydraulic press for pressing car wheels onto an axle, thecharacter 17 designates the hydraulic pressure cylinder and 18 the rodof the piston working therein. The instrument, as a Whole, iscommunicably connected with the hydraulic cylinder by suitablyconnecting the casing 16 of the indicator with the chamber of thehydraulic cylinder, as usual or so that pressure in the cylinder iscommunicated to the indicator. The instrument is arranged With the tapein a horizontal position as being most convenient for the inscription ofthe memoranda upon the exposed part thereof. The cord 11", hereinbeforereferred to is attached to a small Wheel 19 which is fixed on a shaft2() having another larger Wheel or pulley 21 on Which is another cord2121 attached to the piston rod 1S so that as said rod is moved inwardunder the action of pressure it Winds up the cord 111 and thereforemoves the paper tape. The same pressure that moves the rod also, ofcourse, moves the indicator and marker thereby describing on the tape acurve corresponding to the pressure exerted, as usual, generally in suchdevices. When the pressure is cut ofi, the piston of the hydrauliccylinder is returned to initial position by means of a Weighted chain22attached to the piston to dravv it in the proper direction. The returnof the piston under the action of the weighted chain can be speeded byopening a suitable cock to permit the discharge of the Water or pressurefluid from the cylinder. ln the return of the piston the cord 11b is, ofcourse, reWound on the number 11 by the reaction of the spring 9b.

vWhat I claim and desire to secure by Letters Patent is:

1. In a pressure recorder, in combination, a case for containing a papertape and means for supporting and means for moving the tape, a movablemarking device and means for moving the same, the means for moving thetape and the marking device being actuated by the same source ofpressure or stress, said case being constructed to prevent unauthorizedaccess of the attendant to the marking device and provided With anaperture to expose a portion only of the tape beyond the zone ofoperation of the marking device for the inscription of memoranda thereonby the attendant.

2.` In a pressure recorder in combination, a case, a paper tape Withmeans for intermittently moving the same and a stationary platform ortablet over Which the tape passes mounted in the case, a movable markingdevice to mark on said paper tape Where it passes over the platform ortablet, the means for moving the paper tape and the marking device beingoperative independently of each other, a common source of pressure orstress for operating both the marking device and the paper tape, saidcase constructed to prevent kunauthorized access of the attendant to themarking device and provided With an aperture to permit the inscriptionof memoranda on the tape.

3. In a pressure recording apparatus, the combination of apressure-actuated marker, means for moving said marker, a record rollholder having trunnions at its ends, bearings for mounting said holder,in Which said trunnions are adapted to rotate, one of which bearings isyielding axially so that the holder may be removed, means for pressingsaid movable bearing toward the drum, means for preventing rotation ofsaid bearing, a Winding drum, and means for turning said drum to drawthe record strip from the roll holder and Wind it on the drum, the stripin passing from the holder to the drum being carried past and in contactwith the marker.

4. ln a pressure recording apparatus, the combination of apressure-actuated marker, means for moving said marker, a record rollholder, a Winding drum on Which the reccord strip is Wound and by Whichit is drawn from the holder past the marker and in contact therewith, atoothed head to which the drum is removably attached, and an oscillatinginternal head having means for engaging the first drum and turning itintermittently when turning in one direction.

5. In a pressure recorder, the combination with a case, of a recordsheet and a support therefor Within the case, a pressure actuated markeralso Within the case arranged to hear on the record sheet, mechanismoperable by fluid pressures and connected with said marker for movingthesame through distances proportional to such pressures, and means formoving the record sheet past the marker, the case being closed againstunauthorized access of Workmen to the marking device, and having atransparent portion over the path of movement of the marking device,through which the action of said device may be observed, and having alsoan aperture located so as to expose a portion of Copiel o! this tent maybe obtained for the record sheet near the path of the marker to permitthe inscription of memoranda on the sheet.

6. A pressure recorder comprising in com bination a record member, amarker arranged to mark upon said record member, pressure controlledmeans for moving said marker in response to changes in pressure of thefluid of which the pressures are to be recorded, a case inclosing theoperative elements of said recorder and having means to preventunauthorized access of an attendant to said operative elements, and saidcase having means permitting the attendant to complete or supplement therecord made by said marker.

V. K. REED.

ve cents each, by addressing the Commissioner of Patents Washington, D.C.

